# Vitamin B12 Sleep Meta-analysis: What the Evidence Says
Canonical: https://www.migaku.app/guides/vitamin-b12-sleep-meta-analysis-evidence-review
Category: evidence-review
Summary: Vitamin B12 Sleep Meta-analysis has 2 source documents in the current Migaku evidence database. The strongest available sources in this first pass are systema
Last reviewed: 2026-08-05
Reviewed by: Migaku Evidence Review
# Vitamin B12 Sleep Meta-analysis: What the Evidence Says

## Quick Answer

Vitamin B12 Sleep Meta-analysis has 2 source documents in the current Migaku evidence database. The strongest available sources in this first pass are systematic review, so conclusions should be framed as evidence-aware guidance rather than medical advice.

## Key Takeaways

- This page is generated only from sources stored in the Migaku evidence knowledge base.
- Current evidence mix: 1 systematic review, 1 preclinical study.
- Claims should be interpreted with the source type, study design, population, and publication date in mind.
- This article is educational and does not replace care from a qualified clinician.

## Evidence Map

| Source | Evidence type | Level | Date | Identifier |
| --- | --- | ---: | --- | --- |
| Vitamin D and Vitamin B 12 in Psychiatric Disorders: An Exploratory Systematic Review and Meta-Analysis of Nutrient-Specific Status and Supplementation Evidence | systematic review | 1 | 2026-05-10 | 10.3390/diseases14050167 |
| Associations Between Concentrations of Vitamin D3, Vitamin B12, and Folate and the Well-Being of Medical Students | preclinical study | 4 | 2026-05-14 | 10.3390/nu18101559 |

## What The Sources Report

- Clinical and Biological Rationale for an Exploratory Nutrient-Evidence Map of Vitamins D and Bin Psychiatric Disorders 12 12 12 12 12 1 2 3 4 5 6 7 Vitamin B(cobalamin) is clinically relevant to psychiatric practice because deficiency can manifest through nonspecific yet potentially reversible affective, cognitive, and behavioral symptoms, sometimes preceding overt hematologic abnormalities at first clinical contact. [Moroianu Lavinia-Alexandra (2026); evidence level 1]
- This creates a practical risk of misattribution to primary psychopathology or apparent treatment resistance when B-related etiologies are not considered. [Moroianu Lavinia-Alexandra (2026); evidence level 1]
- Global studies and literature reviews have revealed a high prevalence of reduced well-being among medical students. [Cieślikiewicz Beata (2026); evidence level 4]
- In young adults, poor dietary habits are often associated with economic factors, lack of time to prepare nutritious meals, and the use of elimination diets. [Cieślikiewicz Beata (2026); evidence level 4]

## How To Read This Evidence

Evidence level 1 generally reflects systematic reviews or meta-analyses. Level 2 includes randomized trials, guidelines, or public-health guidance. Level 3 usually reflects observational or narrative-review evidence. Level 4 is weaker or early-stage evidence. The level is a sorting aid, not a final quality grade.

## Practical Interpretation

There is at least one systematic-review style source in the current set, so it deserves more weight than single-study evidence. For vitamin B12 sleep meta-analysis, the next editorial step is to add more targeted sources and separate strong findings from early or indirect evidence.

## Limits Of This First Pass

This is a small-batch MVP article. It uses the first ingested sources for this topic and should be expanded with more targeted searches, license review, and human editorial checks before being treated as a definitive review.

## References

- Moroianu Lavinia-Alexandra (2026). Vitamin D and Vitamin B 12 in Psychiatric Disorders: An Exploratory Systematic Review and Meta-Analysis of Nutrient-Specific Status and Supplementation Evidence. DOI: 10.3390/diseases14050167. PMCID: PMC13206110. PMID: 42187879. License: CC BY 4.0. https://pmc.ncbi.nlm.nih.gov/articles/PMC13206110/
- Cieślikiewicz Beata (2026). Associations Between Concentrations of Vitamin D3, Vitamin B12, and Folate and the Well-Being of Medical Students. DOI: 10.3390/nu18101559. PMCID: PMC13209173. PMID: 42197019. License: CC BY 4.0. https://pmc.ncbi.nlm.nih.gov/articles/PMC13209173/

## Safety Note

Health information can change, and individual risk depends on medical history, medications, pregnancy status, age, and diagnosis. Talk with a qualified clinician before changing treatment, supplement, or medication routines.